1<html><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968"><title>drm_gem_cma_prime_vmap</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"><link rel="home" href="index.html" title="Linux DRM Developer's Guide"><link rel="up" href="drm-memory-management.html#idp1123226860" title="CMA Helper Functions Reference"><link rel="prev" href="API-drm-gem-cma-prime-mmap.html" title="drm_gem_cma_prime_mmap"><link rel="next" href="API-drm-gem-cma-prime-vunmap.html" title="drm_gem_cma_prime_vunmap"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center"><span class="phrase">drm_gem_cma_prime_vmap</span></th></tr><tr><td width="20%" align="left"><a accesskey="p" href="API-drm-gem-cma-prime-mmap.html">Prev</a>&#160;</td><th width="60%" align="center">CMA Helper Functions Reference</th><td width="20%" align="right">&#160;<a accesskey="n" href="API-drm-gem-cma-prime-vunmap.html">Next</a></td></tr></table><hr></div><div class="refentry"><a name="API-drm-gem-cma-prime-vmap"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>drm_gem_cma_prime_vmap &#8212; 
2     map a CMA GEM object into the kernel's virtual address space
3 </p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">void * <b class="fsfunc">drm_gem_cma_prime_vmap </b>(</code></td><td>struct drm_gem_object * <var class="pdparam">obj</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer">&#160;</div></div></div><div class="refsect1"><a name="idp1123329644"></a><h2>Arguments</h2><div class="variablelist"><dl class="variablelist"><dt><span class="term"><em class="parameter"><code>obj</code></em></span></dt><dd><p>
4     GEM object
5    </p></dd></dl></div></div><div class="refsect1"><a name="idp1123331172"></a><h2>Description</h2><p>
6   This function maps a buffer exported via DRM PRIME into the kernel's
7   virtual address space. Since the CMA buffers are already mapped into the
8   kernel virtual address space this simply returns the cached virtual
9   address. Drivers using the CMA helpers should set this as their DRM
10   driver's -&gt;<code class="function">gem_prime_vmap</code> callback.
11</p></div><div class="refsect1"><a name="idp1123332676"></a><h2>Returns</h2><p>
12   The kernel virtual address of the CMA GEM object's backing store.
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